| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and method of materializing a pulse width modulated signal that is responsive to a current. SOLUTION: An integrated circuit regulates an output of a power supply and includes a switch coupled so as to receive an external current. The integrated circuit also includes a controller coupled to the switch so as to control a switching of the external current by the switch in response to an external control signal and an internal current sense signal. The internal current sense signal is proportional to the current in the switch. The output of the power supply is also regulated in the absence of the internal current sense signal. COPYRIGHT: (C)2008,JPO&INPIT
|
